You're all forgetting that Trump is a Florida resident and PSA is in SC.
Even if Trump bought the gun (which he didn't), it would have to be shipped to a Florida FFL, which is where he would have to go to fill out the 4473 before taking possession. He was never in a position at PSA where he possibly could have broken the law by signing a 4473.
18 U.S.C. § 992(n) also makes it unlawful for any person under indictment for a crime punishable by imprisonment for a term exceeding one year to ship, transport, or receive firearms or ammunition.
What do we (and the ATF) think “receive” means?
If you’re a prohibited person you can’t even rent a gun at range under the supervision of a licensed person. Doesn’t “receive” mean “handle” or “touch” generally?
How is that not true in this case?